Method and means for printing telegraphy.



. I. KITSEB. METHOD AND MEANS FOR PRINTING TELEGRAPHY. APPLICATION FILED APR.3,1909.

WITNESSES:

' Patented Jan. 14, 1913.

ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA.

METHOD AND MEANS FOR PRINTING TELEGRAPHY.

Specification of Letters latent.

Application filed April 3, 1909. Serial No. 487,671.

Patented Jan. 14, 1913.

To all whom it may concern:

Be it known that I, Isrnon Krrsn'n, citrzen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Methods and Means for Printing Teleg raphy, of which the following is a specification.

My invention relates to an improvement in printing telegraphy and has more special reference to such printing systems wherein a grouping of dots and dashes is required for the purpose of operating necessary electro-magnets to select the required type. As one of the best known types of such system, I take the ingenious Barclay sys tern now employed by one of the largest telegraph companies in this country-as an example. In the Barclay printing system,

the printing of each letter or character reuires the transmission of six impulses orming at the receiving station three tele graphic charactersdots or dashes as the case may be. In the line is'inserted a polarized relay with unbiased armature. Each telegraphic character-the dot as well asdashcommences with an impulse of one polarity and ends with an impulse of opposite polarity, the time unit between the two impulses denoting the dot'or dash. At the receiving station, the tongue of the unbiased line relay rests normally against a passive stop and is brought in connection with an active contact through the first impulse transmitted and rests against this contact till the impulse of opposite polarity moves it again to its normal position. Therefore, the greater or shorter time of contact between the tongue and the forward stop denotes the dot or dash. This relay is operatively related to a local circuit containing two relays,one answering indifferently to a dot as well as dash and the second answering only to a dash. These two relays then control the selective relays and they in turn select and operate the desired type. I have found that it is possible to reduce the impulses necessary to print the desired letter or numeral from the six impulses now used in the Barclay printer to three impulses. Instead of making use of the length of time between two transmitted impulses to denote a dot or dash, I differentiate between the dot and dash by the different polarity of the impulse transmit ted ;the impulse for the dash being of the relays answering only to an impulse of op-' posite polarity. These two relays perform the function of the unbiased line relay of the Barclay system of to-day. To give an example ;In the Barclay printer referred to, one dash succeeded by two dots is required for the purpose of selecting and printing the letter a At the transmitting station, through an automatic tape arrangement, a positive impulse is transmitted followed at an interval oi about three units of time by a negative impulse. At the receiving station, the unbiased tongue of the line relay 'is driven, through the first impulse, to the contact stop and stays there for the length of time required for a dash. The second impulse drives the unbiased armature again to its normal place, and when the operator then transmits a positive and negative impulse in quick succession, it is translated at thereceiving stationinto a dot; and the same is the case in producing the second dot. Of the two local relays above mentioned, both relays will answer to the production of a dash, but only one relay will answer when the dot is produced.

In my system, to produce a dash, I make use ofone short impulse of a predetermined polaritysay a negative polarityand to produce a dot I make use of a short impulse of predetermined opposite olarit say a positive polarity. To pro ace, 1; erefore, according to my system the required dash and two dots at the receiving station, it' is only necessary for me to transmit first one short impulse denoting a dash--say a negative-and then two short impulses denoting two dots-say two positives. circuit, two relays are inserted, one relay substituting the Barclay dash-relay and connected to the circuit of the line relay which answers to the impulse denoting a dash. The second relay is operatively related to both linerelays and is, by preference, provided with two windings, one windlng connected in the circuit of the relay. answering to an impulse of a polarity denotmg a dash and one winding connected in In the local In the line of transmission, I insert the circuit of the relay answering to an impulse denoting a dot.

In the drawing, I have only Illustrated the two linerelays and operat1vely related 5 thereto the first local relays. All other arrangements and devices are well known to persons versed with the Barclay printing sysem used by the telegraph companies ot toa This drawing is a diagrammatic view of the circuit embodyin my invention.

In the drawing, 1 is the line of transmission; 2 and 3 are the line relays. They are polarized in a manner so as to answer to 5 opposite polarities. If the polarized relay 2 answers to a negative impulse, then the polarized relay 3 should only answer to a positive impulse, and it is taken for granted that such is in reality the case. The po- 2' larized relay 2 is provided with the tongue 4 held normally with the aid ot the spring 5 against the stop 6. This relay is also provided with the contact 10. The relay 3 is provided with the tongue 7 held by the 5 spring B'against the stop 9 and is'provided with the contact 11.

12 and 13 are two local relays. The relay 12 is provided with an arrangement adapted to prolong the connection between the armature 15 and the contact 20, so as to form what is technically called a dash. This arran ement is here shown as the spring 16 provi ed with the contact 17. The armature 15 rests normally against the stop 18 and is brought against the stop 19 when the electro-magnet is energized. The coil 14 of this electro-magnet is connected in the circuit 21 adapted to be operated by the operation of the line relay 2. In this circuit is also connected a source of current, here shown as battery-.23. The armature 15, as well as the contact 20, is provided with means to connect the same to any desired circuit. The relay 13 is provided with the armature 25 resting normally against the stop 26, and is adapted to make electrical connection with the contact 29 when the electro-magnet is energized. This relay is provided with the two coils .24 and 22. The

coil 22 is connected in the circuit 21 adapted to be operated by relay 2. and the coil 24 is connected in the circuit 27 adapted to be operated by relay 3. This last named circuit is also provided with a source of current, here shown as battery 28. The contact I 29 and armature 25 are provided with means to connect the same to a desired circuit.

The operation is as follows :It is supposed that the operator desires to transmit no a group of signals whereby at the receiving station the letter a is produced. This -group of signals, according to the Barclay alphabet, consists of a dash followed by two dots. It is taken for'granted that in my i5 system;as' described, a" dash is symbolized by a negative impulse and a dot by a pos1- tive impulse as heretofore stated. The'operator, therefore, transmits first a negatlve impulse of short duration. Th1s 1mpulse will actuate the relay 2 and W111 close, through the operation of this relay, the 10- cal circuit 21, thereby actuating both of the local relays 13 and 12; in other words, a relay adapted to produce a d t and a relay adapted to produce a dash. The operator. then transmits two short impulses of positive polarity denoting dots. These impulses will actuate at the receiving station only the line relay 3 and through its operation the local circuit 27 will be made and will, therefore, only operate the relay 13 representing dots.

The arrangement, just described, mayas stated before-be used for different systems, but is of great advantage in the printing system known as the Barclay. When this arrangement is used in the system known as the Barclay, then the localized circuits adapted to be operated by the localized relays are substituted for the localized circuit of the Barclay printer which is operated by the Barclay line relay. It is unnecessary to here describe in detail the Barclay printer because the same is well known in the art and, with the, above explanation, persons acquainted with the Barclay printer will readily determine the connection and part to which this arrangement applies.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a systemof telegraphy, a line of transmission, means inserted in said line to receive impulses of positive polarity and means inserted in the line of transmission to receive impulses of negative polarity, both means in series as to each other, and localized means to translate'theimpulses of one polarity into required dashes and impulses of opposite polarity into required dots; one

. llt of said localized means compr1s1ng a relay adapted to make contact for each operation for a comparatively short time, and the second of said localized means adapted to make contact for each operation for a comparatively longer time.

'2. In printing telegraphy, a line of transmission, two polarized and biased relays inserted in said line, each relay answering to an impulse of different polarity, a local circuit for each of said relays, two localized translating devices; one of said devices controlled only by one of said relays and the. second of said devices controlled by both of said relays; ne of said devices adapted to translate the impulse received into a dot and the other of said device-3 adapted to translate the impulse received into a dash.

3. In telegraphy, the method, which consists in causing at the receiving station an 13 arrived short impulse of one polarity to be translated into a dot and causing an arrlved short impulse of opposite polarity to be translated into a dot and dash simultaneously.

4. In printing telegraphy, a polarized line relay with biased armature adapted to be operated by an impulse of one polarity, a second polarized relay with biased armature adapted to be operated by an impulse of opposite polarity; a localized relay adapted to be operated by one of said polarized relays; a second localized relay adapted to be operated by both of said polarized relays; one of said localized relays adapted to translate the received impulse into a dot, the second of said localized relays adapted to translate the received impulse into a dash.

5. In printing telegraphy, means to re ceive an impulse of one polarity and short duration inserted in the line, and localized means adapted to be operated by said first means and adapted to translate the short impulse into an impulse of comparatively long duration; means to receive an impulse of opposite polarity and short duration, and localized means to translate said impulse into an impulse of comparatively short duration.

6. In printing telegraphy, two line relays adapted to be operated by impulses of opposite polarity, and localized means for one of said relays to translate the received impulses into dashes, and localized means, common to both relays, to translate the received impulses into dots.

7. In telegraphy, two poralized line relays inserted in series as to each other and the line; one of said relays adapted to respond to a positive impulse and the second of said relays adapted to respond to a negative impulse; a localized translating relay for each of said line relays and means for one of said localized relays to close a circuit for each operation for a comparatively-short time and means for the second localized relay to close a circuit for a comparatively longer time.

8. In telegraphy, in combination, a line of transmission, two electromagnets inserted therein, localized means for one of said electromagnets to produce locally a dash and localized means operatively related to-both of said electromagnets to produce locally a dot.

In testimony whereof I affix my signature in presence of two witnesses.

ISIDOR KITSEE. I

WVitnesses:

EDITH R. STILLEY, MARY C. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C." 

